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B7M bolts are specifically for applications where bolting could be exposed to the H2S-containing environment. B7M bolts and 2HM or 2M nuts are tempered and hardness tested versions of the B7 and 2H grades. HRC 22 is the maximum allowable hardness.

I have been looking into digital radiography for my company as well. An associate at another company had a situation arise where a post stress film radiograph showed an indication that was not visible in the pre-stress digital radigraph. The NDE company has told this associate that cracks...

First of all SA335-P11 is P No. 4 material not P3, the P11 is a group number not a P number. To determine the need for PWHT you would have to tell us the Schedule/wall thickness of the material. You do not have to PWHT P4 material provided; it is 1/2 thick or less, has a carbon content of .015...

I am looking for a Welder testing/certification lab in the Memphis Tennessee area. Any leads would be appreciated.

MJCronin, This is very interesting. I would like to know where this information is referenced. This could prove very useful in my job. Lala

If the piping is related to a Boiler you may have to Use B31.1 which is power piping.

I think you might find this in Volume 04.11 Building Constructions, and Volume 04.01 Cement; Lime; Gypsum.

Your client is right. You will have to qualify a P1-P4 procedure. A change in P number is an essential variable. The base metal that you test on doesn't negate the need for a qualified welding procedure. However, if you have welders that are qualified to weld the P4-P4 procedure they...

According to B31.1 (para. 132) you do not have to PWHT P5A (2.25 Chrome) material if it is 4" in diameter or less, 1/2" thick or less and has .15% carbon or less. We are having a debate as to whether this exemption allows you to weld the material with a procedure that has been...

B31.1 Does pertain to Boiler External and Non-Boiler External Piping. However one of the major differences is the Jurisdictional and Administrative Responsibilities for B31.1 piping. B31.1 piping will refer you back to ASME Section I Boiler Code whereas B31.1 usually provides all of the...